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26 <div id="page-content">
27 <div id="preamble"><h1>Apache Module mod_reqtimeout</h1>
29 <p><span>Available Languages: </span><a href="../en/mod/mod_reqtimeout.html" title="English"> en </a> |
30 <a href="../fr/mod/mod_reqtimeout.html" hreflang="fr" rel="alternate" title="Français"> fr </a></p>
32 <table class="module"><tr><th><a href="module-dict.html#Description">Description:</a></th><td>Set timeout and minimum data rate for receiving requests
34 <tr><th><a href="module-dict.html#Status">Status:</a></th><td>Extension</td></tr>
35 <tr><th><a href="module-dict.html#ModuleIdentifier">Module Identifier:</a></th><td>reqtimeout_module</td></tr>
36 <tr><th><a href="module-dict.html#SourceFile">Source File:</a></th><td>mod_reqtimeout.c</td></tr></table>
39 <p>This module provides a convenient way to set timeouts and minimum data
40 rates for receiving requests. Should a timeout occur or a data rate be
41 to low, the corresponding connection will be closed by the server.</p>
43 <p>This is logged at <code class="directive"><a href="../mod/core.html#loglevel">LogLevel</a></code>
44 <code>info</code>.</p>
46 <p>If needed, the <code class="directive"><a href="../mod/core.html#loglevel">LogLevel</a></code> directive
47 can be tweaked to explicitly log it:</p>
48 <pre class="prettyprint lang-config">LogLevel reqtimeout:info</pre>
51 <div id="quickview"><h3>Topics</h3>
53 <li><img alt="" src="../images/down.gif" /> <a href="#examples">Examples</a></li>
54 </ul><h3 class="directives">Directives</h3>
56 <li><img alt="" src="../images/down.gif" /> <a href="#requestreadtimeout">RequestReadTimeout</a></li>
58 <h3>Bugfix checklist</h3><ul class="seealso"><li><a href="https://www.apache.org/dist/httpd/CHANGES_2.4">httpd changelog</a></li><li><a href="https://bz.apache.org/bugzilla/buglist.cgi?bug_status=__open__&list_id=144532&product=Apache%20httpd-2&query_format=specific&order=changeddate%20DESC%2Cpriority%2Cbug_severity&component=mod_reqtimeout">Known issues</a></li><li><a href="https://bz.apache.org/bugzilla/enter_bug.cgi?product=Apache%20httpd-2&component=mod_reqtimeout">Report a bug</a></li></ul><h3>See also</h3>
60 <li><a href="#comments_section">Comments</a></li></ul></div>
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63 <h2><a name="examples" id="examples">Examples</a> <a title="Permanent link" href="#examples" class="permalink">¶</a></h2>
67 Allow for 5 seconds to complete the TLS handshake, 10 seconds to
68 receive the request headers and 30 seconds for receiving the
71 <pre class="prettyprint lang-config">RequestReadTimeout handshake=5 header=10 body=30</pre>
76 Allow at least 10 seconds to receive the request body.
77 If the client sends data, increase the timeout by 1 second for every
78 1000 bytes received, with no upper limit for the timeout (except for
79 the limit given indirectly by
80 <code class="directive"><a href="../mod/core.html#limitrequestbody">LimitRequestBody</a></code>):
82 <pre class="prettyprint lang-config">RequestReadTimeout body=10,MinRate=1000</pre>
87 Allow at least 10 seconds to receive the request headers.
88 If the client sends data, increase the timeout by 1 second for every
89 500 bytes received. But do not allow more than 30 seconds for the
92 <pre class="prettyprint lang-config">RequestReadTimeout header=10-30,MinRate=500</pre>
97 Usually, a server should have both header and body timeouts configured.
98 If a common configuration is used for http and https virtual hosts, the
99 timeouts should not be set too low:
101 <pre class="prettyprint lang-config">RequestReadTimeout header=20-40,MinRate=500 body=20,MinRate=500</pre>
107 <div class="top"><a href="#page-header"><img alt="top" src="../images/up.gif" /></a></div>
108 <div class="directive-section"><h2><a name="RequestReadTimeout" id="RequestReadTimeout">RequestReadTimeout</a> <a name="requestreadtimeout" id="requestreadtimeout">Directive</a> <a title="Permanent link" href="#requestreadtimeout" class="permalink">¶</a></h2>
109 <table class="directive">
110 <tr><th><a href="directive-dict.html#Description">Description:</a></th><td>Set timeout values for completing the TLS handshake, receiving
111 the request headers and/or body from client.
113 <tr><th><a href="directive-dict.html#Syntax">Syntax:</a></th><td><code>RequestReadTimeout
114 [handshake=<var>timeout</var>[-<var>maxtimeout</var>][,MinRate=<var>rate</var>]
115 [header=<var>timeout</var>[-<var>maxtimeout</var>][,MinRate=<var>rate</var>]
116 [body=<var>timeout</var>[-<var>maxtimeout</var>][,MinRate=<var>rate</var>]
118 <tr><th><a href="directive-dict.html#Default">Default:</a></th><td><code>RequestReadTimeout handshake=0 header=20-40,MinRate=500 body=20,MinRate=500</code></td></tr>
119 <tr><th><a href="directive-dict.html#Context">Context:</a></th><td>server config, virtual host</td></tr>
120 <tr><th><a href="directive-dict.html#Status">Status:</a></th><td>Extension</td></tr>
121 <tr><th><a href="directive-dict.html#Module">Module:</a></th><td>mod_reqtimeout</td></tr>
122 <tr><th><a href="directive-dict.html#Compatibility">Compatibility:</a></th><td>Defaulted to disabled in version 2.3.14 and earlier. The
123 <code>handshake</code> stage is available since version 2.4.39.
126 <p>This directive can set various timeouts for completing the TLS handshake,
127 receiving the request headers and/or the request body from the client.
128 If the client fails to complete each of these stages within the configured
129 time, a <code>408 REQUEST TIME OUT</code> error is sent.</p>
131 <p>For SSL virtual hosts, the <code>handshake</code> timeout values is the time
132 needed to do the initial SSL handshake. If the user's browser is configured to
133 query certificate revocation lists and the CRL server is not reachable, the
134 initial SSL handshake may take a significant time until the browser gives up
135 waiting for the CRL. Therefore the <code>handshake</code> timeout should take
136 this possible overhead into consideration for SSL virtual hosts (if necessary).
137 The body timeout values include the time needed for SSL renegotiation
140 <p>When an <code class="directive"><a href="../mod/core.html#acceptfilter">AcceptFilter</a></code> is in use
141 (usually the case on Linux and FreeBSD), the socket is not sent to the
142 server process before at least one byte (or the whole request for
143 <code>httpready</code>) is received. The handshake and header timeouts
144 configured with <code class="directive">RequestReadTimeout</code> are only effective
145 after the server process has received the socket.</p>
147 <p>For each of the three timeout stages (handshake, header or body), there are
148 three ways to specify the timeout:
153 <li><strong>Fixed timeout value</strong>:<br />
155 <div class="example"><p><code><var>stage</var>=<var>timeout</var></code></p></div>
157 <p>The time in seconds allowed for completing the whole stage (handshaking,
158 reading all of the request headers or body). A value of 0 means no limit.</p>
161 <li><strong>Disable module for a vhost</strong>:<br />
163 <div class="example"><p><code>handshake=0 header=0 body=0</code></p></div>
165 <p>This disables <code class="module"><a href="../mod/mod_reqtimeout.html">mod_reqtimeout</a></code> completely (note that
166 <code>handshake=0</code> is the default already and could be omitted).</p>
169 <li><strong>Timeout value that is increased when data is
170 received</strong>:<br />
171 <div class="example"><p><code>
172 <var>stage</var>=<var>timeout</var>,MinRate=<var>data_rate</var>
175 <p>Same as above, but whenever data is received, the timeout value is
176 increased according to the specified minimum data rate (in bytes per
180 <li><strong>Timeout value that is increased when data is received, with an
181 upper bound</strong>:<br />
182 <div class="example"><p><code>
183 <var>stage</var>=<var>timeout</var>-<var>maxtimeout</var>,MinRate=<var>data_rate</var>
186 <p>Same as above, but the timeout will not be increased above the second
187 value of the specified timeout range.</p>
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